Finding the Third Proportional to 250,590 and 521,916

Step by Step Solution

1. Step 1: Write the proportion equation
   250,590 : 521,916 = 521,916 : x
2. Step 2: Convert to fraction form
   250,590/521,916 = 521,916/x
3. Step 3: Cross multiply
   250,590x = 521,916 × 521,916
4. Step 4: Simplify right side
   250,590x = 272,396,311,056
5. Step 5: Solve for x
   x = 272,396,311,056/250,590
6. Step 6: Final answer
   x = 1,087,019.88